how I can show the sum of in a datagridview column

问题:

I need to show the sum of the count column from this datagridview, but I don't know how I can get to the data in the datagridview.

When I click on the button, I want to show 94 in label1.

How can this be done?

回答1:

int sum = 0;
for (int i = 0; i < dataGridView1.Rows.Count; ++i)
{
    sum += Convert.ToInt32(dataGridView1.Rows[i].Cells[1].Value);
}
label1.text = sum.ToString();

回答2:

Fast and clean way using LINQ

int total = dataGridView1.Rows.Cast<DataGridViewRow>()
                .Sum(t => Convert.ToInt32(t.Cells[1].Value));

verified on VS2013

回答3:

If your grid is bound to a DataTable, I believe you can just do:

// Should probably add a DBNull check for safety; but you get the idea.
long sum = (long)table.Compute("Sum(count)", "True");

If it isn't bound to a table, you could easily make it so:

var table = new DataTable();
table.Columns.Add("type", typeof(string));
table.Columns.Add("count", typeof(int));

// This will automatically create the DataGridView's columns.
dataGridView.DataSource = table;

回答4:

Use LINQ if you can.

  label1.Text =  dataGridView1.Rows.Cast<DataGridViewRow>()
                                   .AsEnumerable()
                                   .Sum(x => int.Parse(x.Cells[1].Value.ToString()))
                                   .ToString();

回答5:

 decimal Total = 0;

for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
    Total+= Convert.ToDecimal(dataGridView1.Rows[i].Cells["ColumnName"].Value);
  }

labelName.Text = Total.ToString();

回答6:

Add the total row to your data collection that will be bound to the grid.

回答7:

you can do it better with two datagridview, you add the same datasource , hide the headers of the second, set the height of the second = to the height of the rows of the first, turn off all resizable atributes of the second, synchronize the scrollbars of both, only horizontal, put the second on the botton of the first etc.

take a look:

   dgv3.ColumnHeadersVisible = false;
   dgv3.Height = dgv1.Rows[0].Height;
   dgv3.Location = new Point(Xdgvx, this.dgv1.Height - dgv3.Height - SystemInformation.HorizontalScrollBarHeight);
   dgv3.Width = dgv1.Width;

   private void dgv1_Scroll(object sender, ScrollEventArgs e)
        {
            if (e.ScrollOrientation == ScrollOrientation.HorizontalScroll)
            {
                dgv3.HorizontalScrollingOffset = e.NewValue;
            }
        }

回答8:

//declare the total variable
int total = 0;
//loop through the datagrid and sum the column 
for(int i=0;i<datagridview1.Rows.Count;i++)
{
    total +=int.Parse(datagridview1.Rows[i].Cells["CELL NAME OR INDEX"].Value.ToString());

}
string tota